7 Troubleshooting
Installation and operation manual
12
BS4~12A14AJV1B
VRV 5 branch selector unit
4P670163-1 – 2022.02
In case of detection when the unit is in standby
When the detection occurs when the unit is in standby, a "false
detection check" will occur.
False detection check
1
The unit starts fan operation on the lowest setting.
2
The user interface displays error "
A0-13
", emits an alarm sound
and the status indicator blinks.
3
The sensor checks if a refrigerant leakage or misdetection
occurred.
▪ No refrigerant leakage detected.
Result:
The system resumes
normal operation after approximately 2 minutes.
▪ Refrigerant leakage detected.
Result:
1
The user interface displays error "
A0-11
", emits an alarm sound
and the status indicator blinks.
2
Contact your dealer immediately. For more information, see the
installation manual of the outdoor unit.
In case of detection when the unit is turned on
1
The user interface displays error "
A0-11
", emits an alarm sound
and the status indicator blinks.
2
Contact your dealer immediately. For more information, see the
installation manual of the outdoor unit.
INFORMATION
The minimum airflow during normal operation or during the
refrigerant leakage detection is always >240 m
3
/h.
INFORMATION
To stop alarm of the user interface see the reference guide
of the user interface.
7
Troubleshooting
If one of the following malfunctions occur, take the measures shown
below and contact your dealer.
WARNING
Stop operation and shut OFF the power if anything
unusual occurs (burning smells etc.).
Leaving the unit running under such circumstances may
cause breakage, electrical shock or fire. Contact your
dealer.
The system MUST be repaired by a qualified service person.
Malfunction
Measure
If a safety device such as a fuse, a
breaker or an earth leakage breaker
frequently actuates.
Turn off the main power
switch.
If water leaks from the unit.
Stop the operation.
If the system does NOT operate properly except for the above
mentioned cases and none of the above mentioned malfunctions is
evident, investigate the system in accordance with the following
procedures.
Malfunction
Measure
If a refrigerant leak
occurs (error code
/
)
▪ Actions will be taken by the system. Do
NOT turn OFF the power supply.
▪ Notify your installer and report the
malfunction code.
If the system does not
operate at all.
▪ Check if there is no power failure. Wait
until power is restored. If power failure
occurs during operation, the system
automatically restarts immediately after
power is restored.
▪ Check if no fuse has blown or breaker is
activated. Change the fuse or reset the
breaker if necessary.
If after checking all above items, it is impossible to fix the problem
yourself, contact your installer and state the symptoms, the complete
model name of the unit (with manufacturing number if possible) and
the installation date (possibly listed on the warranty card).
7.1
Symptoms that are NOT system
malfunctions
The following symptoms are NOT system malfunctions:
7.1.1
Symptom: Noise
▪ A "zeen" sound is heard immediately after the power supply is
turned on. The electronic expansion valve inside the BS unit starts
working and makes the noise. Its volume will reduce in about one
minute.
▪ A continuous low hissing sound is heard when the system is in
cooling or defrost operation. This is the sound of refrigerant gas
flowing through the BS unit.
▪ A hissing sound originating from the 4-way valve in the outdoor
unit which is heard at the start or immediately after stopping
operation or defrost operation, or when switching from cooling to
heating operation and vice versa.
8
Relocation
Contact your dealer for removing and reinstalling the total unit.
Moving units requires technical expertise.
9
Disposal
This unit uses hydrofluorocarbon. Contact your dealer when
discarding this unit. It is required by law to collect, transport and
discard the refrigerant in accordance with the "hydrofluorocarbon
collection and destruction" regulations.
NOTICE
Do NOT try to dismantle the system yourself: dismantling
of the system, treatment of the refrigerant, oil and other
parts MUST comply with applicable legislation. Units
MUST be treated at a specialised treatment facility for
reuse, recycling and recovery.
